Liquid fuel feeding system



Patented July 26, 1932 v UNITED STATES PATENT orl-"lcs DOUGLAS COLLINS, OF SALISBURY, IIOBTE CAROLINA, ASSIGNOB TO STEWART-WARNER- COBPORL'IION, OF CHICAGO, ILLINOIS, A. CORPORATION OII! V'IRGDTIA mourn runr. rnnnme SYSTEM:

Applicationfled September 28, 1927. Serial No. 881,584.

My invention relates to improvements in liquid fuel feeding systems, which, while especially designed for use in connection with ignition circuits of internal combustion en- '5 gines of automotive vehicles, is also applicable for use in pumping systems for other internal combustion engines when used for other purposes.

a The; invention contemplates the utilization 10 of an electro-magnetic power pump of the flexible diaphragm type, receiving its impulses through energy from the usual ignition coil of the electrical ignition system of the internal combustion engine or motor through a magnetic force created in the coil and used by the pump device. The action of the pump is intermittent and this intermittent motion is preferably secured and controlled from the rotary distributer that controls the electrical energy of the spark plugs of the motor.

The pump is combined with the coil of the ignition system and is located between the supply tank for gasoline and the carbureter of the fuel system. The pump is operated to furnish a continuous, regular, and uniform supply of gasoline to the carbureter from the gasoline tank, and the fuel is then fed as usual from the carbureter to the cylinders of the engine or motor. In carrying out my invention I utilize the core of the coil of the ignition system as the electro-magnet for imparting a working impulse to the diaphragm of the engine-pump, and the diaphragm is provided with a specially arranged armature as will be described.

In the accompanying drawing I have illustrated one complete example of the physical embodiment of my invention wherein the coil and the pump are combined and arranged according to the best mode I have thus far devised for the practical application of the principles of my invention, but it will be understood that various changes and alterations may be made within the scope of my appended claims without departing from the spirit of my invention.

Figure 1 is a diagrammatic view showing the relation of parts including the fuel feed system and a portion of the wiring for the automobile igmtion, and lighting.

Figure 2 is a View showing the pump in section and attached to a standard type of coil,

and Figure 3 is a sectional detail view of one ammeter A are shown together with the spark coil C having the primary winding 1 and the secondary winding 2.

The primary winding of the coil is connected by wire 3 to the switch I and also with the breaker points P to the ground, While the secondary winding 2 of the coil is shown as grounded, and the wire 4 from this winding leads to the distributer D, or rather to the rotary arm of the distributer.

As in actual practice, it will be understood that the breaker points, indicated at P in con nection. with the primary winding, are located directly beneath the distributer D, but these parts are diflerently located in the drawings for convenience of illustration.

The gasoline is contained in a usual tank (not shown) and the gasoline flows through the main pipe 5 to the pump indicated as a whole by the numeral 6, and thence from the pump by way of the carbureter pipe 7 the gasoline passes to the carbureter 8. At 9 a pipe is indicated in Figure 1 as leading from the carbureter to the motor or engine cylinder, and the motor may be employed for propelling land vehicles, water craft or air craft, or for other purposes.

At each side of the pump is provided a check valve as 10 and 11, in which a ball valve 12 is located, and the valve 10'prevents backward flow of gasoline through pipe 5 while check valvell prevents backward flow gasoline through the carbureter pipe 7.

The pump, which is of the flexible diaphragm type, is electro-magnetically operated through the instrumentality of the core 13 of the coil C, which core has a head 14.

The core 13 is converted for my use by the addition of the head to the usual coil core and the prolongation of the core and head so that it will project a suitable distance be-,

low the coil C, which coil is of usual or standard type found in the electrical systems of automobiles.

The pump 6, or its casing, comprises the lower section 16 and the top section 15, the latter having an inlet ort 17 for the pipe 5 and an outlet port 18 or the pipe 7 so that the gasoline may pass transversely through the upper section of the casing from pipe 5 to pipe 7. The cord 13 has its head 14 located within the water chamber or top section of the pump and a packing gland 19 may be provided in the top of the casing 15 to prevent escape of water around the stationary core The pump may be combined with the coil in actual use in any suitable way, one of which is shown in the drawing where brackets or bracket-arms 20 and'screws 21 are used to attach thepump at the under side or lower end of the coil, and of course these arts may be enclosed in a single housing if esired, or combined in other suitable manner as the case may be.

In Fi re 2 I have shown one type of flexible diaphi'agm in the form or shape of a disk 22, whlch is flexible due to the presence of the concentric rings or circular corrugations in its body, but it will be understood that other shapes or forms ma be used for the diaphragm. Preferably t is diaphragm is made of fused q uartz, as I have discovered that such material is highly efficient in the performance of the functions required of the diaphragm. The edges of the diaphragm are retained between the complementary, exte rior flanges 23 and 23' of the casing sections and the screws or bolts 24 that secure the flanged sections also pass through or clamp the edges of the diaphragm rigidly in the walls of the casing in order that the edges of the diaphragm may be anchored against movement while the cener or central part of the diaphragm is relatively free to move under impulse fromthe head 14 of the electromagnet. I

At the center of the diaphragm the latter is fashioned with an opening in which is permanently fixed an armature 25 preferably fashioned of soft iron in the form of a plate,

and the spring 26 has its ends anchored to the armature and bottom of the bottom section ofthe casing.

. The soft iron plate forming the armature 25 is located directly beneath the magnethead 14 and sufiiciently close to the head as to be attracted by the magnet when the latter is energized. The electro-magnet, in the illus trated exemplification of a six cylinder motor, will be energized six times to one revolution of the rotary arm of the distributer D,

and of course-each time the magnet is energized it imparts an impulse to the pump diaphragm that forces gasoline from the top section of the casing through the carbureter pipe 7. After each impulse or working stroke of the diaphragm it is lowered by action of the spring 26, gravity, and the weight of the gasoline remaining in the top section or gasoline chamber.

From the above description taken in connection with my drawing it will be apparent that I have devised an appliance or fuel feeding system whereby the ma etism or magnetic energy of the core 13, w 'ch in the ignition systems for automobiles is not used except possibly to boost the general efliciency of the spark coil, is now used exterior of the coil for the purpose of pumping the gasoline supply.

While I have shown a specific t pe of magnetic pump it will be understoo that other types of pumps may be 0 erated by the electro-magnet that I provi e by extending the core 13 beyond the coil and into working position for the. pump member, and such changes and alterations are contemplated by me. As shown, the well known spark coil in the ignition system has been converted for use by me without the addition of any substantial or material parts and the coil is changed only in that its core is elongated and a head 14 formed thereon exterior of the coil. The use for any additional or auxiliary electrical apparatus in carrying out my invention-is thus eliminated and the purposes of my invention are accomplished through the usual standard ignition systems for automotivevehicles, aircraft, or water craft.

Havin thus fully described my invention,

what I c aim as new and desire to secure by Letters Patent is 1. In a fuel feeding system for internal combustion engines, the combination with the ignition circuit of the engine and the ignition coil unit including the casing and core, a pump casing mounted on the ignition coil unit and having a pumping member arranged for pumping movement toward and from the core, the core havin a stem extending from the coilcasing an a head carried by said stem within the pump casing, the pumping member having fixed to it an armature opposite the core head for cooperating magnetically with the core head for actuation of the pum ing member.

2. In a uel feeding system for internal combustion engines, the combination with the ignition circuit of the engine and the ignition coil unit including the casing and core,

member having fixed to it an armature opposite the core head for cooperating magnetically with the core head for movement-of the pumping member toward the core, and a spring reacting on the umping member for movement thereof in t e opposite direction.

3. The construction defined in claim 1, the pum casing having its chambers noncommumcating with the casing of the ignition coil unit. I DOUGLAS COLLINS. 

